1)   Blaiz Enterprises - Secure Message 1.00.293
Quick, strong encryption (private password) for plain text, AOL compatible, auto encryption detection. Simple, easy and fast - no technical knowledge needed. Integrated Help. No installation.

 2)   CryptIt 1.301
CryptIt is designed to use conventional XOR encryption on keys that are the same size as the file to be encrypted. CryptIt also has a ability to use removable media (USB drives, CDs, floppies) as a key code book.